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Data Sparrow
Local-first • uploads need consent
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View & understand

Data Viewer

Preview

Open a table and see its rows, columns, and any problems.

On this device or temporary online processing. This tool remains in preview while its specialist workflow and output acceptance are completed.

Start on this deviceNothing is uploaded.
Getting ready… Accepted here: CSV, TSV, JSON, NDJSON, XLSX, XLS, XLSB, ODS, PARQUET, SQLITE

Large files are checked before opening. On this device, a file can be up to 128 MB, 2 million rows, and 10,000 columns.

Formulas and scripts are never run. Every cell is treated as text so a file cannot run hidden instructions.